Challenge problem IR peaks: 2966 (very broad), 1721, 780 cm¹. The signal at 12.8 ppm disappears with the addition of D₂O. Hint: The signal at 3.8 ppm is bound to the functional group represented by the signal at 12.8 ppm. Chemical Formula: C13H1802 1H, broad singlet 12 10 d = doublet 2H, d -0 8 2H, d PPM 6 2H, d 1H, quartet 6H, d 3H, d 1H, m 2

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.